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In Reply to: Re: Same protractor for all arm lengths. The problem is ... posted by Sea Monster on September 9, 2006 at 18:39:18:
the effective length is 307mm and the overhang is 12mm.Using JE's baerwald spreadsheet an arm of 307mm effective length will have an overhang of 13.3mm and a spindle to pivot distance of 293.7mm.
Obviously the 295mm distance is wrong for the Baerwald null points. And I suspect the Orsonic headshell may have changed the effective length but that is another problem.
If we solve the equation to determine the effective length using the spindle to mounting distance of 295 and the Stevenson null points of 60.5/117 we get 306.7mm effective length.
As is the case with many Japanese tonearms they often are designed for Stevenson null points which gives the arm a different linear offset and headshell offset angle.
I suspect if you were to align the cartridge with Stevenson null points it will work.
Send me an email and I will mail you a Stevenson protractor you can printout. It works for any length tonearm.
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Follow Ups
- According to the manual .... - Garth 01:27:33 09/10/06 (6)
- Re: According to the manual .... - Sea Monster 03:38:25 09/10/06 (5)
- No, the manual is correct.... for use with this ... - Garth 04:10:09 09/10/06 (4)
- The measurement is in fact from stylus tip to headshell base - Sea Monster 06:25:40 09/10/06 (3)
- What does stylus tip to headshell base mean? - Garth 06:36:22 09/10/06 (2)
- Re: What does stylus tip to headshell base mean? - Sea Monster 05:09:59 09/11/06 (1)
- Less elegant than what? - Garth 05:19:29 09/11/06 (0)